The Forestry Forum is sponsored in part by:

iDRY Vacuum Kilns


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.




Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

Michigan Firewood, your BRUTE FORCE Authorized Dealer

Baker Products

ECHO-Bearcat

iDRY Wood Lumber Vacuum Drying for everyon

Nyle Kiln Dry Systems

Chainsawr, The Worlds Largest Inventory of Chainsaw Parts

Smith Sawmill Service



Author Topic: second story deck support  (Read 5192 times)

0 Members and 1 Guest are viewing this topic.

Offline Wood Toucher

  • member
  • *
  • Posts: 4
  • Age: 65
  • Location: Williamstown, WV
  • Gender: Male
  • I'm new!
    • Share Post
second story deck support
« on: August 21, 2014, 08:29:55 AM »
I've been looking for plans for wood support brackets for a second story balcony.  The house is a raised 1.5 story with full foundation out of the ground.  Dirt to deck is over 18 feet and we don't want to use posts.  Are there drawings for an L shaped support with 45 degree brace someone has for this purpose?  Deck will be small 4' x 8' or so.  I've been a lurker for a few years and finally had a question worth asking.  Thanks.

Offline jueston

  • Senior Member
  • ****
  • Posts: 875
  • Age: 34
  • Location: St. Paul MN
  • Gender: Male
    • Share Post
Re: second story deck support
« Reply #1 on: August 21, 2014, 08:52:54 AM »
if you put some kind of 4 foot bracket under the deck, you would certainly need to reinforce the wall in which you are attaching that brace....

and if your going to open up the walls for that, then you might consider what has became all the rage in new construction decks lately, removing the rim joist, and sistering the floor joists with PT 2X's and then cantalevering those 2X's out of the side of the house.

random internet picture of what i'm talking about:
 

Offline Wood Toucher

  • member
  • *
  • Posts: 4
  • Age: 65
  • Location: Williamstown, WV
  • Gender: Male
  • I'm new!
    • Share Post
Re: second story deck support
« Reply #2 on: August 21, 2014, 09:48:12 AM »
Thanks Jueston, we would normally go that route except the second floor joists run the wrong way.  We would be providing vertical wood framing members in the wall to support the bracing and loads from the balcony, too.  We envision bolting the supports thru the board and batten siding and thru the wood framing in the wall to support this load.

Offline Wood Toucher

  • member
  • *
  • Posts: 4
  • Age: 65
  • Location: Williamstown, WV
  • Gender: Male
  • I'm new!
    • Share Post
Re: second story deck support
« Reply #3 on: September 08, 2014, 12:10:14 AM »
We have another deck on the adjacent side of the house which we would like to sister the 2 x 8 joints for a 4 foot wide balcony.  What's the rule for the distance the joist has to be sistered for each foot of cantilever?

Offline beenthere

  • Senior Member x2
  • *****
  • Posts: 27075
  • Location: Southern Wisconsin, USA
  • Gender: Male
    • Share Post
Re: second story deck support
« Reply #4 on: September 08, 2014, 12:48:49 AM »
Any local building code you have to follow?
That would be one minimum if so.

Don't know of a "rule" for cantilever when sistering on to joists.  Are they 2 x 8 joists now? As well, a 2 x 8 rim board?

Your location in your bio (profile) would help a lot. ;)

south central Wisconsin
 It may be that my sole purpose in life is simply to serve as a warning to others

Offline jueston

  • Senior Member
  • ****
  • Posts: 875
  • Age: 34
  • Location: St. Paul MN
  • Gender: Male
    • Share Post
Re: second story deck support
« Reply #5 on: September 08, 2014, 11:34:14 AM »
from 2012 IRC:

Quote
ABLE R502.3.3(2) CANTILEVER SPANS FOR FLOOR JOISTS SUPPORTING EXTERIOR BALCONYa, b, e, f

Member Size   Spacing   Maximum Cantilever Span
(Uplift Force at Backspan Support in lb)c, d
Ground Snow Load
                        ≤ 30 psf   50 psf   70 psf
2 8         12″   42″ (139)   39″ (156)   34″ (165)
2 8         16″   36″ (151)   34″ (171)   29″ (180)
2 10   12″   61″ (164)   57″ (189)   49″ (201)
2 10   16″   53″ (180)   49″ (208)   42″ (220)
2 10   24″   43″ (212)   40″ (241)   34″ (255)
2 12   16″   72″ (228)   67″ (260)   57″ (268)
2 12   24″   58″ (279)   54″ (319)   47″ (330)

For SI: 1 inch = 25.4 mm, 1 pound per square foot = 0.0479 kPa.
a. Spans are based on No. 2 Grade lumber of Douglas fir-larch, hem-fir, southern pine and spruce-pine-fir for repetitive (three or more) members.
b. Ratio of backspan to cantilever span shall be at least 2:1.
c. Connections capable of resisting the indicated uplift force shall be provided at the backspan support.
d. Uplift force is for a backspan to cantilever span ratio of 2:1. Tabulated uplift values are permitted to be reduced by multiplying by a factor equal to 2 divided by the actual backspan ratio provided (2/backspan ratio).
e. A full-depth rim joist shall be provided at the unsupported end of the cantilever joists. Solid blocking shall be provided at the supported end.
f. Linear interpolation shall be permitted for ground snow loads other than shown.

the formatting didn't work out that good, i got it from:
http://publicecodes.cyberregs.com/icod/irc/2012/icod_irc_2012_5_par017.htm

Offline Wood Toucher

  • member
  • *
  • Posts: 4
  • Age: 65
  • Location: Williamstown, WV
  • Gender: Male
  • I'm new!
    • Share Post
Re: second story deck support
« Reply #6 on: September 08, 2014, 12:02:00 PM »
2 x 8's are the floor joists in the house at 16" o.c.
The house is my daughter and son-in-law's in rural Ohio with no codes except for the bank's "inspection".
They are finishing a shell house on the inside and wanted to put decks where they have french doors.


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
Single story deck with a second story framed on top

Started by iancorey on Timber Framing/Log construction

5 Replies
469 Views
Last post July 05, 2021, 10:10:38 PM
by Don P
xx
1939 deck of logging theme playing cards support auction

Started by Jeff on General Board

0 Replies
641 Views
Last post February 04, 2012, 04:26:39 PM
by Jeff
xx
Time to re deck the deck

Started by rimshot on Sawmills and Milling

6 Replies
1322 Views
Last post October 01, 2013, 06:43:41 PM
by rimshot
xx
Pre-raising frame fit up story & raising story

Started by Jim_Rogers on Timber Framing/Log construction

44 Replies
10890 Views
Last post March 07, 2012, 08:21:09 AM
by addicted
 


Powered by EzPortal